<template>
	<view>
		<my-search bgColor="pink" @click.native="goSearch"></my-search>
		<view class="scroll-view-container">
			<!-- 左侧的滚动视图区域 -->
			<scroll-view class="left-scroll-view" scroll-y :style="{height:wh+'px'}">
				<view class="left-scroll-view-item" :class="{active:index === activeIndex}" v-for="(item,index) in cateList" :key="item.cat_id" @click="changeActive(index)">{{item.cat_name}}</view>
			</scroll-view>
			<!-- 右侧的滚动视图区域 -->
			<scroll-view class="right-scroll-view" scroll-y :style="{height:wh+'px'}" :scroll-top="top">
				<view class="cate-lv2" v-for="(item2, i2) in cateleavel2" :key="i2">
				    <view class="cate-lv2-title">/ {{item2.cat_name}} /</view>
					<!-- 动态渲染三级分类的列表数据 -->
					    <view class="cate-lv3-list">
					      <!-- 三级分类 Item 项 -->
					      <view class="cate-lv3-item" v-for="(item3, i3) in item2.children" :key="i3" @click="goToCateList(item3)">
					        <!-- 图片 -->
					        <image :src="item3.cat_icon"></image>
					        <!-- 文本 -->
					        <text>{{item3.cat_name}}</text>
					      </view>
					    </view>
				  </view>
			</scroll-view>
		</view>
	</view>
</template>

<script>
	// 导入自己封装的 mixin 模块
	import badgeMix from '@/mixins/tabbar-badge.js'
	export default {
		mixins:[badgeMix],
		onLoad() {
			this.wh = uni.getSystemInfoSync().windowHeight - 50
			// 调用获取分类列表数据的方法
			this.getCateList()
		},
		data() {
			return {
				wh: 0,
				// 分类数据列表
				cateList: [],
				activeIndex:0,//默认是第1个是激活的状态
				cateleavel2:[],
				top:0
			};
		},
		methods: {
			async getCateList() {
				// 发起请求
				const {
					data: res
				} = await uni.$http.get('/api/public/v1/categories')
				// 判断是否获取失败
				if (res.meta.status !== 200) return uni.$showMsg()
				// 转存数据
				this.cateList = res.message
				this.cateleavel2 = res.message[0].children
			},
			changeActive(index){
				this.activeIndex = index
				 this.cateleavel2 = this.cateList[index].children
				 this.top = this.top === 0 ? 1 :0 
			},
			goToCateList(item3){
				uni.navigateTo({
				    url: '/subpkg/goods_list/goods_list?cid=' + item3.cat_id
				  })
			},
			goSearch(){
				uni.navigateTo({
					url:'/subpkg/search/search/search'
				})
			}
		}
	}
</script>

<style lang="scss">
	.scroll-view-container {
		display: flex;

		.left-scroll-view {
			width: 120px;
		}

		.right-scroll-view {
			flex: 1;
		}
	}

	.left-scroll-view-item {
		height: 60px;
		line-height: 60px;
		background-color: #f7f7f7;
		font-size: 14px;
		text-align: center;

		&.active {
			background-color: #fff;
			position: relative;

			&::before {
				display: block;
				content: "";
				width: 3px;
				height: 40px;
				background: red;
				position: absolute;
				left: 0;
				top: 50%;
				transform: translateY(-50%);
			}
		}
	}
	.cate-lv2-title {
	  font-size: 12px;
	  font-weight: bold;
	  text-align: center;
	  padding: 15px 0;
	}
	.cate-lv3-list{
		display: flex;
		flex-wrap: wrap;
		.cate-lv3-item{
			width:33.333%;
			display: flex;
			flex-direction: column;
			align-items: center;
			justify-content: center;
			image{
				width:100rpx;
				height:100rpx;
			}
		}
	}
</style>
